Question

What are trigonometric functions of all in all the four quadrants?

Answer 1

Trigonometric functions: sin, cos, tan, sec, cosec, cot.

Quadrant one: 0° to 90° - All functions are positive
Quadrant two: 90° to 180° - Only sin, cosec are positive
Quadrant three: 180° to 270° - Only tan, cot are positive
Quadrant four: 270° to 360° - Only cos, sec are postive

Note: Less than 0° is nothing but Quadrant 4 in which only cos, sec are positive.